/* Copyright (C) 2004 - 2006  db4objects Inc.  http://www.db4o.com

This file is part of the db4o open source object database.

db4o is free software; you can redistribute it and/or modify it under
the terms of version 2 of the GNU General Public License as published
by the Free Software Foundation and as clarified by db4objects' GPL 
interpretation policy, available at
http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
Suite 350, San Mateo, CA 94403, USA.

db4o is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. */
using System;

namespace Db4objects.Db4o.Internal.Handlers
{
	public class SByteHandler : IntegralTypeHandler
	{
		public SByteHandler(ObjectContainerBase containerBase)
			: base(containerBase)
		{
        }

        public override int Compare(Object o1, Object o2){
            return ((sbyte)o2 > (sbyte)o1) ? 1 : -1;
        }

        public override Object DefaultValue(){
            return (sbyte)0;
        }
      
        public override Object Read(byte[] bytes, int offset){
            return (sbyte)  ((bytes[offset]) - 128) ;
        }

        public override int TypeID(){
            return 20;
        }
      
        public override void Write(Object obj, byte[] bytes, int offset){
            bytes[offset] = (byte)(((sbyte)obj) + 128);
        }
      
    }
}
